Cabling systems

Today at a fast rate, computer technology is
being applied in all spheres of activity of enterprises
and organizations that dramatically increases the
amount of information which must be passed within
a building or complex of buildings, compactly situated
in the same area, without access to the public service
network. This resulted in the rapid development
of technology of local area networks (LANs).

Computer network is a summation of devices (computers,
terminals, office equipment), which have the opportunity
of information exchange with each other using special
communications equipment and software.

Statistical researches on the cost and duration
of operation of individual components of the network
showed that the life of network equipment, software
and computer park ranges from 1.5 to 4 years, while
the cabling system serves 10 to 15 years.

Past experience clearly dictates the necessity
of creation a cabling system in an office, which
satisfies the following requirements:

is universal (opportunity to
use for transmission of various
types of signals);

quickly allows to create new
workstations and change the network
topology;

allows to organize a unified
service of operating;

has a big warranty period.

The structured cabling system (SCS) satisfies
all of the above requirements. To date, structured
cabling system is the best solution for creating
reliable, efficient and relatively simple in operation
local and telephone networks.

Structured Cabling System (SCS)

Modern structured cabling system is an integrated
and inseparable part of utilities buildings. Once
installed, it can function for many years, for which
several generations of communications equipment
may be alternated.

It is well-known that the main and only function
of SCS is a guaranteed continuous delivery to the
subscriber of services of various types. In today's
networks – it is at least, voice and data local
area network, to which, if necessary, the signals
of buildings life support, security, fire alarm
and video surveillance system, CTV, etc can be added.
In addition, SCS is equipped with its own power
and protect circuits.

Because of the expansion of the computer parks
and increasing the number of workstations, each
company and each office should consider the establishment
of a structured cabling system. Otherwise invest
in expensive networking equipment, servers and workstations
cannot give a qualitative improvement of operation
of local area network and cannot be efficient.

Properly designed structured cabling system will
have
20 years full warranty on the link and help
to protect investments. According to independent
estimates, SCS reduces the cost of network administration
at 2 - 5 times, reduces downtime (failures) in the
network by 30-50%. SCS allows you quickly to add
and reconfigure workstations.

Regulatory requirements for SCS

Standards for the telecommunications systems
of buildings have been developed since 1985. Preparation
of regulatory documentation was made by several
organizations:

Electronic Industries Association
of USA - EIA

Telecommunications Industry
Association of USA - TIA

The result of their activities has become the
standard for telecommunications cabling systems
for commercial buildings TIA/EIA-568. Currently
a new edition of American Standard TIA/EIA-568-B
works, also another important regulatory document
TIA/EIA-606 “Administration Standard for Commercial
Telecommunications Infrastructure. Elements of an
administration system.” works. Standard defines
the rules for documentation of SCS during the operation
- labeling, recordkeeping, rules for designing drawings,
reports, etc.

Work on the standardization of SCS was being
led by International Organization for Standardization
(ISO) and International Electrotechnical Commission
(IEC) in parallel with the TIA / EIA. Standard ISO
/ IEC 11801 "Information technology — Generic cabling
for customer premises." is not fundamentally opposed
to the American standard TIA/EIA-568.

In SCS, which satisfy the standard TIA/EIA-568-B,
are used cables of category 5e and above.

Currently, most of created structured cabling
systems are based on standards TIA/EIA-568-B, TIA/EIA-606,
ISO / IEC 11801, GOST 34.602-89